Question

In a reversible process:

• A. entropy of the system increases.
• B. entropy of the system decreases.
• C. entropy of the combined system and surroundings does not change.
• D. entropy of all systems in the universe is constant.

Answer 1

The correct option is C entropy of the combined system and surroundings does not change.

In thermodynamics, a reversible process is a process whose direction can be "reversed" by inducing infinitesimal changes to some property of the system via its surroundings, with no increase in entropy. Throughout the entire reversible process, the system is in thermodynamic equilibrium with its surroundings.In a reversible process entropy of the combined system and surroundings does not change.